联合双边滤波器和小波阈值收缩去噪算法研究

刘尚旺, 郜刘阳, 王博

Research on image denoising algorithm of joint bilateral filter and wavelet threshold shrinkage

Shangwang LIU, Liuyang GAO, Bo WANG

表1 不同等级高斯噪声下各种算法的PSNR值

Tab.1 PSNR in different levels Gaussian noise(dB)

算法 图像编号 高斯噪声密度 平均值 0.005 0.010 0.015 0.200 NLM ① 30.03 29.72 29.24 28.71 29.43 ② 28.35 28.07 27.78 27.32 27.88 ③ 28.28 28.00 27.73 27.31 27.83 ④ 28.93 28.67 28.29 27.81 28.43 ⑤ 29.34 29.01 28.53 28.05 28.73 ⑥ 27.53 27.28 26.96 26.63 27.05 BF ① 42.06 40.75 39.42 37.81 40.01 ② 39.16 38.27 37.36 37.02 37.95 ③ 33.11 32.00 31.47 28.93 31.34 ④ 37.77 36.35 35.02 33.14 35.57 ⑤ 36.27 35.81 33.32 32.23 34.41 ⑥ 34.39 33.12 32.25 30.01 32.44 小波阈值收缩 ① 20.60 18.42 16.99 15.29 17.83 ② 20.13 18.52 16.68 16.01 17.84 ③ 24.07 23.15 22.46 21.82 22.88 ④ 27.69 25.87 24.60 23.68 25.46 ⑤ 28.57 26.47 25.10 23.67 25.67 ⑥ 27.43 25.72 24.57 23.66 25.34 PDE ① 41.84 39.53 38.04 36.96 39.10 ② 40.74 38.12 36.42 35.33 37.65 ③ 40.35 37.35 35.32 33.78 36.70 ④ 40.96 38.31 36.66 35.45 37.85 ⑤ 40.95 38.44 36.92 35.87 38.05 ⑥ 41.00 38.29 36.46 35.13 37.72 本文算法 ① 46.56 41.76 39.63 38.36 41.58 ② 46.31 41.13 38.51 37.88 40.96 ③ 45.95 40.86 38.69 37.16 40.67 ④ 46.13 41.23 39.16 37.18 40.93 ⑤ 46.01 41.18 39.03 37.56 40.95 ⑥ 46.60 41.59 38.97 36.24 40.85